US4362960A - Spacer assembly for a stator venting duct of an electric power machine - Google Patents
Spacer assembly for a stator venting duct of an electric power machine Download PDFInfo
- Publication number
- US4362960A US4362960A US06/259,274 US25927481A US4362960A US 4362960 A US4362960 A US 4362960A US 25927481 A US25927481 A US 25927481A US 4362960 A US4362960 A US 4362960A
- Authority
- US
- United States
- Prior art keywords
- support sheet
- metal support
- venting duct
- spacer
- stops
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
Definitions
- the invention relates to a spacer assembly for a stator venting duct in an electric power machine.
- the stator magnetic circuit of a power alternator is often constituted by a set of magnetic laminations stacked along the axis of the rotor and clamped together by means of tie rods parallel to this axis.
- venting ducts i.e. gaps provided between the laminations of the stack, in which gaps a cooling gas circulates radially.
- venting duct spacer members in the form of rods which extend radially and which are clamped between two laminations of the stack.
- the rods must be fixed on a metal support sheet so as to allow the stack to be assembled without danger of the rods moving.
- the venting duct spacer members are made of metal and are resistance welded on to a soft steel support sheet 0.6 mm thick. They are interposed in the stator stack, the magnetic laminations used for the magnetic circuit not being suitable for welding. Once the spacer members are welded, the welds are fettled (cleaned) and the assembly is coated with a protective layer of paint.
- the disadvantage of this solution is that the metal support sheet and the metal spacer members (which, in general, are non-magnetic) are the seat of appreciable losses, thereby reducing the efficiency of the machine.
- Preferred embodiments of the present invention produce a stator venting duct spacer assembly for an electric power machine in which simple means are provided to greatly reduce the losses.
- the present invention provides a spacer assembly for a stator venting duct of an electric power machine whose stator magnetic circuit is constituted by an axial stack of magnetic laminations, said stack being held clamped and being cooled by circulation of a fluid in venting ducts each formed by a gap which is maintained by the spacer assembly between two laminations of the stack.
- the spacer assembly includes:
- a metal support sheet which is suitable for incorporating in the axial stack of magnetic laminations to constitute one side of the venting duct therein, said metal support sheet having an inner surface on the venting duct side and an outer surface on the opposite side, said metal support sheet being a metal sheet of the same magnetic quality and same thickness as those of the magnetic circuit and having fixing means which project into the venting duct from the said inner surface;
- the distance pieces are elastically flexible rods made of an insulating material, said fixing means constituting at least three side stops, said side stops being disposed alternately on either side of the rod and out of line therewith so as to keep the rod elastically bent and thus to obtain permanent lateral pressure of the rod on each of the stops.
- the invention can provide the following advantages.
- the side stops are formed on the protected and insulated metal sheet, this dispensing with workshop units for fettling and painting metal support sheets.
- FIG. 1 is a front view of a spacer assembly in accordance with the invention, the plane of the figure being perpendicular to the axis of the alternator.
- FIG. 2 is a cross-section of the spacer assembly on an enlarged scale taken about line II--II, FIG. 1, the cross-section being parallel to the axis of the alternator.
- a spacer member is conventionally constituted by rods 4 of rectangular cross-section and clamped between two laminations 2 and 6 constituting the magnetic circuit of the stator of an alternator.
- the rods are in the shape of curved sectors and are disposed in a substantially radial configuration so as to maintain gaps (venting ducts) 12 between given laminations 6, 8, 10, etc.
- a cooling gas is thus enabled to circulate radially in said gaps.
- These stops are formed by cutting and bending the support sheet 2 to form tongues which are, for example, rectangularly bent and whose bases 18 remain integral with and connected to the sheets and whose tongue ends or heads 20 (sides or apexes on the furthest sides from the bases) project above the sheets to constitute abutments for the sides of rods 4.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
A spacer assembly for a stator venting duct of an electric power machine. This spacer assembly is constituted by spacer members in the form of flexible insulating rods (4) and a magnetic metal support sheet disposed in a substantially radial configuration between two magnetic metal sheets (2, 6) of the stack which constitutes the stator magnetic circuit of an alternator. Stops (16) are formed on the metal support sheet (2) cutting out tongues and bending them to engage both sides of the rod after elastically bending the rod.
Description
The invention relates to a spacer assembly for a stator venting duct in an electric power machine.
The stator magnetic circuit of a power alternator is often constituted by a set of magnetic laminations stacked along the axis of the rotor and clamped together by means of tie rods parallel to this axis.
This stack is subjected to losses, i.e. it gives off heat due to the effect of variable magnetic induction. The magnetic circuit is cooled by venting ducts, i.e. gaps provided between the laminations of the stack, in which gaps a cooling gas circulates radially. These gaps are maintained by venting duct spacer members in the form of rods which extend radially and which are clamped between two laminations of the stack. The rods must be fixed on a metal support sheet so as to allow the stack to be assembled without danger of the rods moving.
In accordance with one known solution, the venting duct spacer members are made of metal and are resistance welded on to a soft steel support sheet 0.6 mm thick. They are interposed in the stator stack, the magnetic laminations used for the magnetic circuit not being suitable for welding. Once the spacer members are welded, the welds are fettled (cleaned) and the assembly is coated with a protective layer of paint. The disadvantage of this solution is that the metal support sheet and the metal spacer members (which, in general, are non-magnetic) are the seat of appreciable losses, thereby reducing the efficiency of the machine.
Preferred embodiments of the present invention produce a stator venting duct spacer assembly for an electric power machine in which simple means are provided to greatly reduce the losses.
The present invention provides a spacer assembly for a stator venting duct of an electric power machine whose stator magnetic circuit is constituted by an axial stack of magnetic laminations, said stack being held clamped and being cooled by circulation of a fluid in venting ducts each formed by a gap which is maintained by the spacer assembly between two laminations of the stack. The spacer assembly includes:
a metal support sheet which is suitable for incorporating in the axial stack of magnetic laminations to constitute one side of the venting duct therein, said metal support sheet having an inner surface on the venting duct side and an outer surface on the opposite side, said metal support sheet being a metal sheet of the same magnetic quality and same thickness as those of the magnetic circuit and having fixing means which project into the venting duct from the said inner surface; and
distance pieces or spacer members fixed on said inner surface of said metal support sheet by means of said fixing means so as to maintain the gap which forms a venting duct between said inner surface and the adjacent magnetic lamination on the other side of the venting duct.
The distance pieces are elastically flexible rods made of an insulating material, said fixing means constituting at least three side stops, said side stops being disposed alternately on either side of the rod and out of line therewith so as to keep the rod elastically bent and thus to obtain permanent lateral pressure of the rod on each of the stops.
The invention can provide the following advantages.
Since it is no longer necessary to weld the spacer members, the metal support sheets used can be identical to those of the magnetic circuit and therefore losses therein are low. (Further, only on type of metal sheet is necessary).
The side stops are formed on the protected and insulated metal sheet, this dispensing with workshop units for fettling and painting metal support sheets.
Since the spacer members are made of insulating materials, they are not the seat of loss. With the improved magnetic quality of the metal support sheets, this leads to improved energy efficiency of the machine.
With reference to the accompanying figures, an implementation of the invention is described by way of a non-limiting example. When the same component is illustrated in several figures, it is designated by the same reference therein.
FIG. 1 is a front view of a spacer assembly in accordance with the invention, the plane of the figure being perpendicular to the axis of the alternator.
FIG. 2 is a cross-section of the spacer assembly on an enlarged scale taken about line II--II, FIG. 1, the cross-section being parallel to the axis of the alternator.
A spacer member is conventionally constituted by rods 4 of rectangular cross-section and clamped between two laminations 2 and 6 constituting the magnetic circuit of the stator of an alternator. The rods are in the shape of curved sectors and are disposed in a substantially radial configuration so as to maintain gaps (venting ducts) 12 between given laminations 6, 8, 10, etc. A cooling gas is thus enabled to circulate radially in said gaps.
Each rod is made of insulating material extending lengthwise in the plane of the gap 12 and having thickness coextensive with the thickness of the gap and is fixed on either one of the adjacent two magnetic laminations 2, 6 forming support sheets by suitable fixing means so as to allow the stack to be assembled without the rods moving.
A rod is constituted by layers of glass fabric and (epoxy) resin, the layers of fabric 22 being disposed in planes perpendicular to the stack compression direction 24 (the "longitudinal" direction, i.e. the direction of the axis of the alternator). Such a constitution enables it to withstand the high compression to which it is must subject and because of which conventional rods are made of metal.
The fixing means are constituted by side stops 16 provided by local deformation of the support sheet 2.
These stops are formed by cutting and bending the support sheet 2 to form tongues which are, for example, rectangularly bent and whose bases 18 remain integral with and connected to the sheets and whose tongue ends or heads 20 (sides or apexes on the furthest sides from the bases) project above the sheets to constitute abutments for the sides of rods 4.
The rods 4 are flexible, i.e. easily deformable by elastic bending and there are at least three stops which are disposed alternately on either side of a rod and out of line therewith so as to bend the rod and thus, after easy installing, to make it exert a permanent sideways pressing force on each of the tongue ends 20, the resulting friction preventing the rod from moving away.
Claims (4)
1. A spacer assembly for a stator venting duct of an electric power machine having a stator magnetic circuit constituted by an axial stack of magnetic laminations, said stack being held clamped and being cooled by circulation of a fluid in venting ducts each formed by a gap which is maintained by spacer members between two laminations of the stack, said spacer assembly including:
a metal support sheet incorporated in the axial stack of magnetic laminations to constitute one side of the venting duct therein, said metal support sheet having an inner surface on the venting duct side and an outer surface on the opposite side, said metal support sheet being of the same magnetic quality and same thickness as the laminations of the magnetic circuit and having fixing means which project into the venting duct from said inner surface; and
spacer members fixed on said inner surface of said metal support sheet by means of said fixing means so as to maintain the gap which forms a venting duct between said surface and the adjacent magnetic lamination on the other side of the venting duct; and
wherein said spacer members comprise flexible rods made of an insulating material extending lengthwise in the plane of the gap, having a thickness coextensive with the thickness of said gap, and wherein said fixing means constitute a succession of at least three side stops for each of said flexible rods, said side stops being disposed alternately on either side of each rod and out of line so as to keep each rod elastically bent in the plane of the gap providing permanent lateral pressure of the rod by deformation on each of the stops.
2. A spacer according to claim 1, wherein said stops are constituted by deformations of said metal support sheet.
3. A spacer member according to claim 2, wherein said stops are constituted by tongues cut in the metal support sheet, the tongues including a base constituted by a side remaining attached to the metal support sheet and a head on the side furthest from said base, the tongue being curved so that its head projects away from said inner surface.
4. A spacer member according to claim 1, wherein said rod is constituted by layers of glass fabric in a polymerized resin, layers of glass fabric being disposed parallel to said metal support sheet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8009763 | 1980-04-30 | ||
| FR8009763A FR2481853A1 (en) | 1980-04-30 | 1980-04-30 | STATORIC EVENT DISTANCE DEVICE FOR POWER DYNAMOELECTRIC MACHINE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4362960A true US4362960A (en) | 1982-12-07 |
Family
ID=9241530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/259,274 Expired - Fee Related US4362960A (en) | 1980-04-30 | 1981-04-30 | Spacer assembly for a stator venting duct of an electric power machine |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4362960A (en) |
| EP (1) | EP0039049B1 (en) |
| AR (1) | AR222764A1 (en) |
| BR (1) | BR8102620A (en) |
| CA (1) | CA1155895A (en) |
| DE (1) | DE3163959D1 (en) |
| ES (1) | ES8202993A1 (en) |
| FR (1) | FR2481853A1 (en) |
| PT (1) | PT72952B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4542313A (en) * | 1983-10-03 | 1985-09-17 | Westinghouse Canada Inc. | Magnetic core spacer with means to prevent adverse vibrations thereof |
| US5814910A (en) * | 1995-09-06 | 1998-09-29 | Eldim, Inc. | Cooling vanes for rotating electric machinery |
| US6376945B1 (en) * | 2000-05-08 | 2002-04-23 | General Electric Company | Cooling flow gas transition inserts in stator core ducts and methods of cooling a stator core |
| US6498408B2 (en) | 2000-12-20 | 2002-12-24 | General Electric Company | Heat transfer enhancement at generator stator core space blocks |
| US20030071525A1 (en) * | 2000-12-20 | 2003-04-17 | General Electric Company | Heat transfer enhancement at generator stator core space blocks |
| US6583526B2 (en) * | 1999-10-19 | 2003-06-24 | General Electric Company | Generator stator core vent duct spacer posts |
| DE102007000636A1 (en) | 2007-11-07 | 2009-05-14 | Alstom Technology Ltd. | Rotor for electrodynamic machine i.e. hydro generator, has spacing webs that are supported on rim bolts extending through sheet metal member of rotor in axial direction in order to absorb centrifugal forces that are applied to spacing webs |
| US7893577B2 (en) | 2007-03-30 | 2011-02-22 | Alstom Technology Ltd | Rotor for an electrodynamic machine |
| EP2639937A1 (en) | 2012-03-16 | 2013-09-18 | Alstom Technology Ltd | Rotor for an electrodynamic machine |
| US20140070640A1 (en) * | 2012-09-13 | 2014-03-13 | General Electric Company | Cooling ducts in an electro-dynamic machine |
| EP2835889A3 (en) * | 2013-07-09 | 2015-12-09 | Siemens Aktiengesellschaft | Laminated sheet package and electromagnetic device |
| CN106329761A (en) * | 2016-08-30 | 2017-01-11 | 江苏微特利电机股份有限公司 | Double-channel-steel stator ventilation structure for motor |
| US20170077770A1 (en) * | 2014-03-06 | 2017-03-16 | Siemens Aktiengesellschaft | Electric machine with a rotor cooled by cooling gas |
| US10910926B2 (en) * | 2018-05-31 | 2021-02-02 | Siemens Energy, Inc. | Method for repairing generator stator core |
| WO2022266809A1 (en) * | 2021-06-21 | 2022-12-29 | Abb Schweiz Ag | Air duct assembly for rotor, associated rotor and electric machine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5869912A (en) * | 1997-07-25 | 1999-02-09 | General Electric Co. | Direct-cooled dynamoelectric machine stator core with enhanced heat transfer capability |
| GB2338350B (en) * | 1998-04-16 | 2002-08-21 | Gec Alsthom Ltd | Improvements in or relating to electrical rotating machines |
| DE102008016758A1 (en) | 2008-03-31 | 2009-10-01 | Alstom Technology Ltd. | Cooled stator for e.g. generator, has distance bars used as bar sections and turbulence elements for local increase of heat transfer between cooling agent and stator, where bar sections and elements are provided in gaps in area of teeth |
| EP3168962A1 (en) * | 2015-11-10 | 2017-05-17 | Siemens Aktiengesellschaft | A stator core for an electromechanical machine |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE103236C (en) * | ||||
| US422863A (en) * | 1890-03-04 | washburn | ||
| GB191405234A (en) * | 1914-02-28 | 1914-10-29 | British Thomson Houston Co Ltd | Improvements in and relating to Dynamo Electric Machines. |
| US1282684A (en) * | 1917-02-19 | 1918-10-22 | Allis Chalmers Mfg Co | Core construction for electrical apparatus. |
| US1320781A (en) * | 1919-11-04 | Bert mossay | ||
| US1476986A (en) * | 1919-09-22 | 1923-12-11 | Allis Chalmers Mfg Co | Ventilating-duct construction for dynamo-electric machines |
| DE539161C (en) * | 1929-09-22 | 1931-11-23 | Otto Titus Blathy Dr Ing | Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ducts |
| CH162251A (en) * | 1932-04-08 | 1933-06-15 | Oerlikon Maschf | Laminated core with spacers for electrical machines. |
| US2099575A (en) * | 1936-06-24 | 1937-11-16 | Gen Electric | Dynamo-electric machine |
| SU127738A1 (en) * | 1959-06-16 | 1959-11-30 | В.В. Домбровский | Rotor cooling system of electric synchronous machine |
| BE669485A (en) * | 1964-10-15 | 1965-12-31 | ||
| GB1029507A (en) * | 1963-08-30 | 1966-05-11 | Westinghouse Electric Corp | Dynamoelectric machine rotor |
| US3439202A (en) * | 1966-04-07 | 1969-04-15 | Licentia Gmbh | Cooling system for electrical generators |
-
1980
- 1980-04-30 FR FR8009763A patent/FR2481853A1/en active Granted
-
1981
- 1981-04-15 AR AR284990A patent/AR222764A1/en active
- 1981-04-23 DE DE8181103061T patent/DE3163959D1/en not_active Expired
- 1981-04-23 EP EP81103061A patent/EP0039049B1/en not_active Expired
- 1981-04-29 ES ES501762A patent/ES8202993A1/en not_active Expired
- 1981-04-29 PT PT72952A patent/PT72952B/en unknown
- 1981-04-29 BR BR8102620A patent/BR8102620A/en unknown
- 1981-04-29 CA CA000376527A patent/CA1155895A/en not_active Expired
- 1981-04-30 US US06/259,274 patent/US4362960A/en not_active Expired - Fee Related
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE103236C (en) * | ||||
| US422863A (en) * | 1890-03-04 | washburn | ||
| US1320781A (en) * | 1919-11-04 | Bert mossay | ||
| GB191405234A (en) * | 1914-02-28 | 1914-10-29 | British Thomson Houston Co Ltd | Improvements in and relating to Dynamo Electric Machines. |
| US1282684A (en) * | 1917-02-19 | 1918-10-22 | Allis Chalmers Mfg Co | Core construction for electrical apparatus. |
| US1476986A (en) * | 1919-09-22 | 1923-12-11 | Allis Chalmers Mfg Co | Ventilating-duct construction for dynamo-electric machines |
| DE539161C (en) * | 1929-09-22 | 1931-11-23 | Otto Titus Blathy Dr Ing | Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ducts |
| CH162251A (en) * | 1932-04-08 | 1933-06-15 | Oerlikon Maschf | Laminated core with spacers for electrical machines. |
| US2099575A (en) * | 1936-06-24 | 1937-11-16 | Gen Electric | Dynamo-electric machine |
| SU127738A1 (en) * | 1959-06-16 | 1959-11-30 | В.В. Домбровский | Rotor cooling system of electric synchronous machine |
| GB1029507A (en) * | 1963-08-30 | 1966-05-11 | Westinghouse Electric Corp | Dynamoelectric machine rotor |
| BE669485A (en) * | 1964-10-15 | 1965-12-31 | ||
| US3439202A (en) * | 1966-04-07 | 1969-04-15 | Licentia Gmbh | Cooling system for electrical generators |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4542313A (en) * | 1983-10-03 | 1985-09-17 | Westinghouse Canada Inc. | Magnetic core spacer with means to prevent adverse vibrations thereof |
| US5814910A (en) * | 1995-09-06 | 1998-09-29 | Eldim, Inc. | Cooling vanes for rotating electric machinery |
| US6583526B2 (en) * | 1999-10-19 | 2003-06-24 | General Electric Company | Generator stator core vent duct spacer posts |
| US6376945B1 (en) * | 2000-05-08 | 2002-04-23 | General Electric Company | Cooling flow gas transition inserts in stator core ducts and methods of cooling a stator core |
| US6498408B2 (en) | 2000-12-20 | 2002-12-24 | General Electric Company | Heat transfer enhancement at generator stator core space blocks |
| US20030071525A1 (en) * | 2000-12-20 | 2003-04-17 | General Electric Company | Heat transfer enhancement at generator stator core space blocks |
| US6777836B2 (en) | 2000-12-20 | 2004-08-17 | General Electric Company | Heat transfer enhancement at generator stator core space blocks |
| US7893577B2 (en) | 2007-03-30 | 2011-02-22 | Alstom Technology Ltd | Rotor for an electrodynamic machine |
| DE102007000636A1 (en) | 2007-11-07 | 2009-05-14 | Alstom Technology Ltd. | Rotor for electrodynamic machine i.e. hydro generator, has spacing webs that are supported on rim bolts extending through sheet metal member of rotor in axial direction in order to absorb centrifugal forces that are applied to spacing webs |
| EP2639937A1 (en) | 2012-03-16 | 2013-09-18 | Alstom Technology Ltd | Rotor for an electrodynamic machine |
| US20140070640A1 (en) * | 2012-09-13 | 2014-03-13 | General Electric Company | Cooling ducts in an electro-dynamic machine |
| EP2835889A3 (en) * | 2013-07-09 | 2015-12-09 | Siemens Aktiengesellschaft | Laminated sheet package and electromagnetic device |
| US20170077770A1 (en) * | 2014-03-06 | 2017-03-16 | Siemens Aktiengesellschaft | Electric machine with a rotor cooled by cooling gas |
| CN106329761A (en) * | 2016-08-30 | 2017-01-11 | 江苏微特利电机股份有限公司 | Double-channel-steel stator ventilation structure for motor |
| US10910926B2 (en) * | 2018-05-31 | 2021-02-02 | Siemens Energy, Inc. | Method for repairing generator stator core |
| WO2022266809A1 (en) * | 2021-06-21 | 2022-12-29 | Abb Schweiz Ag | Air duct assembly for rotor, associated rotor and electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| PT72952B (en) | 1982-04-08 |
| FR2481853A1 (en) | 1981-11-06 |
| ES501762A0 (en) | 1982-02-16 |
| BR8102620A (en) | 1982-01-19 |
| EP0039049B1 (en) | 1984-06-06 |
| CA1155895A (en) | 1983-10-25 |
| ES8202993A1 (en) | 1982-02-16 |
| EP0039049A1 (en) | 1981-11-04 |
| PT72952A (en) | 1981-05-01 |
| FR2481853B1 (en) | 1983-01-07 |
| DE3163959D1 (en) | 1984-07-12 |
| AR222764A1 (en) | 1981-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4362960A (en) | Spacer assembly for a stator venting duct of an electric power machine | |
| US5382860A (en) | Electromagnetic pump stator core | |
| US4208597A (en) | Stator core cooling for dynamoelectric machines | |
| US4472651A (en) | Permanent magnet rotor | |
| JP3122433B2 (en) | Stator core for alternately stacked linear motor | |
| CA1204468A (en) | Magnetic suspension device of a rotor placed in a sealed enclosure | |
| US4255684A (en) | Laminated motor stator structure with molded composite pole pieces | |
| US6420813B1 (en) | Bulk amorphous metal magnetic components for electric motors | |
| US20010030486A1 (en) | Electric machine with structural spacer | |
| US20060125340A1 (en) | Motor with stator formed by assembling divided stator-members into an annular shape, and compressor incorporating the same motor | |
| CA2759499C (en) | Wedge for a stator of a generator with preformed coil windings | |
| EP0606974B1 (en) | Laminated electromagnetic pump stator core | |
| US20050067911A1 (en) | Stator for an electrical machine | |
| JP2007244065A (en) | Stator structure of concentrated winding motor | |
| JP3817883B2 (en) | Linear motor | |
| GB2055253A (en) | Winding and core assembly for an electrical machine | |
| EP3435523B1 (en) | Magnet structure and motor | |
| US20200006993A1 (en) | Motor | |
| US3777190A (en) | Superposed-strip field winding for rotary electric machines | |
| US2347063A (en) | Field winding for dynamoelectric machines | |
| US4214182A (en) | Support structure for armature conductors | |
| KR100802622B1 (en) | Stator structure for reciprocating motor | |
| JP2001145327A (en) | Armature for linear motor | |
| EP3334010B1 (en) | Rotor for use in motor and motor adopting same | |
| US11277063B2 (en) | Motor component for a linear motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: DITE: ALSTROM-ATLANTIQUE 38, AVENUE KLEBER 75784 P Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GILLET, ROGER;REEL/FRAME:004040/0378 Effective date: 19810414 |
|
| MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M170); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
| FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M171); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
| FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| LAPS | Lapse for failure to pay maintenance fees | ||
| FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19941207 |
|
| STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |